package io;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

public class LargeMappedFiles {
	static int length = 0x8FFFFFF;
	public static void main(String[] args) throws FileNotFoundException, IOException {
		MappedByteBuffer out = new RandomAccessFile("test.dat", "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, length);
		for(int i = 0; i < length; i++) {
			out.put((byte)'x');			
		}
		System.out.println("Finished writing");
		for(int i = length/2; i < length/2 + 6; i ++) {
			System.out.print((char)out.get(i));
		}
	}

}
